Panasonic 2SA1391S

PNP epitaxial planar silicon transistor for low-noise audio frequency amplifier applications, housed in a 3-pin mini plastic package with dimensions of 6.0 mm × 4.0 mm × 1.3 mm. Maximum collector-to-emitter voltage is 50 V, collector current is 200 mA, and collector dissipation is 400 mW. Junction temperature ranges from -55 °C to +150 °C. DC current gain (hFE) at IC = 1 mA is ranked S (140 to 280). Gain-bandwidth product is 250 MHz, output capacitance is 2.7 pF, and noise level is 40 mV under specified test conditions. Complies with standard semiconductor reliability practices but no external standards such as AEC-Q200 or RoHS are cited. Part number 2SA1391S is not explicitly listed; summary reflects the 2SA1391 series.